语言之所以可以学习,就是因为语言具有系统性和规则性,如果一门语言没有系统性和规则性,那门语言就没有可学性。所谓系统性,就是一个系统是由内在的各个部分组成的,各个部分之间相互制约,要了解各个部分之间的相互关系,就得从整体出发。而学习者在学习这一系统规则时,,必须从局部出发去尝试一点点地弄懂这个系统,经过不断的发现错误与改正错误才能达到从整体出发的水平。在学习过程中,由于各种原因,学习者都有可能违反构成这一系统的规则。要以所学习的语言规则为参照,来才能判断学习者的对错。 Language can learn because the language is systematic and regular. If a language is not systematic and regular, the language has no learning. The so-called systematic, that is, a system is composed of internal parts, the various parts of each other constraints, to understand the relationship between the various parts, we must proceed from the overall. When learners learn the rules of the system, they must try to understand the system from a local perspective and can achieve the goal of starting from the whole through continuous detection of errors and correction of errors. During the learning process, learners are likely to violate the rules that make up the system for a variety of reasons. To learn the language rules as a reference, to judge the right or wrong learners.